12131244420 has 48 divisors (see below), whose sum is σ = 34000041600. Its totient is φ = 3231897856.

The previous prime is 12131244397. The next prime is 12131244439. The reversal of 12131244420 is 2444213121.

It is a super-2 number, since 2×12131244420² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33432 + ... + 159311.

It is an arithmetic number, because the mean of its divisors is an integer number (708334200).

Almost surely, 2^12131244420 is an apocalyptic number.

12131244420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131244420 is an abundant number, since it is smaller than the sum of its proper divisors (21868797180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131244420 is a wasteful number, since it uses less digits than its factorization.

12131244420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193804 (or 193802 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 12131244420 its reverse (2444213121), we get a palindrome (14575457541).

The spelling of 12131244420 in words is "twelve billion, one hundred thirty-one million, two hundred forty-four thousand, four hundred twenty".